Radiothermoluminescence and Transitions in Polymers |
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Page 128
... structure models of different molecular weight linear polyethylenes : dish- eveled , unpeeled crystal for low - molecular - weight sample and lamellar crystals for high- and medium - molecular - weight samples . 1 , 2 , and 3 indicate ...
... structure models of different molecular weight linear polyethylenes : dish- eveled , unpeeled crystal for low - molecular - weight sample and lamellar crystals for high- and medium - molecular - weight samples . 1 , 2 , and 3 indicate ...
Page 129
... molecular weight . There is a similar shift in the positions of the two thermoluminescence maxima . The highest - temperature transition shifts from 238 K for a low - molecular - weight sample to 232.5 for a high- molecular - weight ...
... molecular weight . There is a similar shift in the positions of the two thermoluminescence maxima . The highest - temperature transition shifts from 238 K for a low - molecular - weight sample to 232.5 for a high- molecular - weight ...
Page 146
... molecular - weight evaluation is important , be- cause it was shown that the T , value for atactic polypropylenes falls dramatically in the low - molecular - weight region [ 103 ] . 8 Heptane - Soluble and -Insoluble Fractions . Atactic ...
... molecular - weight evaluation is important , be- cause it was shown that the T , value for atactic polypropylenes falls dramatically in the low - molecular - weight region [ 103 ] . 8 Heptane - Soluble and -Insoluble Fractions . Atactic ...
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Common terms and phrases
activation energy annealing atactic atoms blend changes charge Charlesby Chem chemical cis-polybutadiene components concentration constant cooling copolymer cross-linking crystal decay decrease density depends dielectric distribution dose E/kT electron affinity electron traps emission entropy equilibrium evaluation excited molecules factor first-order fluorescence fraction free volume frequency frequency factor glass glass-transition temperature glow curve glow peak grafting heating increase INTENSITY relative units interaction interfacial intersystem crossing interzonal ionization irradiation isotactic kinetic linear low-temperature luminescence centers LUMINESCENCE INTENSITY relative Macromolecules material maxima maximum mechanical melting method molecular motion molecules Nikolskii nuclear magnetic resonance observed occur oxygen phase phosphorescence Phys polybutadiene polyethylene samples polyisobutylene polypropylene polystyrene position quenching radiation radicals radiothermoluminescence reaction recombination relaxation transitions room temperature secondary relaxation semicrystalline semicrystalline polymers spectra spectroscopy structure temperature thermal thermodynamic thermoluminescence thermoluminescence peaks tion transition temperature trapped electrons untrapping vibrational vinyl vulcanization whereas Zlatkevich
References to this book
Polymer Surfaces and Interfaces II, Volume 2 W. J. Feast,H. S. Munro,R. W. Richards Snippet view - 1993 |